baber/WOPTO huggingface dataset:
Patent GB-653466-A (GB)
Title: Generation of high voltage for the cathode ray tubes of television receivers
IPC: H04N3/18
Filed: 1948-07-06
Abstract: 653,466. Rectifying. BURNDEPT, Ltd., and WALE, E. F. July 6, 1948, No. 18150. [Class 38 (ii)] A method of deriving anode voltage for the cathode-ray tube of a television receiver from the flyback voltage set up in the circuit of the output valve 1 of the saw-tooth scanning generator, consists in including in the anode circuit of the cathode-ray tube, in series with, but not coupled to, the scanning coils 6-if these are in the anode circuit-or the primary winding 4 of the scanning transformer, a coil 9 of small inductance compared with the scanning coils at the transformer primary winding and of high Q, and including at least a part of the coil, in series with the scanning coils or the transformer primary winding, in the output circuit of the scanning saw-tooth generator. The voltages appearing across the coil 9 and the winding 4 during fly-back are added and rectified by the diode 3 to charge a condenser 11 from which is taken the E.H.T. supply. The time constant of the coil 9 is small compared with the fly-back time so that during the time of one voltage peak in the winding 4 a number of peaks may occur in the coil 9.
Patent GB-894039-A (GB)
Title: Improvements in or relating to coupling arrangements particularly for use in electric lighting fittings
Inventor: MORRIS KENNETH STAPLETON
IPC: F21V21/02
Filed: 1959-05-28
Abstract: 894,039. Electric light fittings. GENERAL ELECTRIC CO. Ltd. May 5, 1960 [May 28, 1959], No. 18214/59. Class 75(3) [Also in Group XXV] In a coupling arrangement for securing at least one arm in the form of a rod or tube to a base member, the base member is provided with one or more holes extending right through the part of the member in which it is formed and into which an arm can be inserted with both ends projecting, clamping being effected by a bridge piece comprising a point engaging the arm at opposite ends of the hole on a grub screw or the like bearing on the surface of the base member between the ends of the hole and being tightened against the engaged surface. In an electric light fitting, a circular boss 1 is supported from the ceiling by a rod 11 and has concentric walls 3, 5 in which are a series of aligned holes 6, 7 to receive lamp supporting arms 8. The arms are held in place by U-shaped clamps 14 having parallel faces 16 formed with holes 17 and connected by a portion 15 in which is threaded a grub screw 18. The clamps 14 straddle the wall 3 and the rod is passed through the holes 6, 7 and 17 and clamped in place by tightening the screw 18 which bearson the underside of the wall 3. The edges of the holes 17 which engage the arms 8 may be serrated. A cover 29 may be secured over the base of the boss 1 to conceal the clamping members and, where fewer arms are used..than the number of holes in the boss, the unused holes may be closed by plugs. In a modification, the boss may be in the form of an elongated channel attached directly to the ceiling and having a series of holes uniformly spaced along the longer walls.
Patent GB-641865-A (GB)
Title: Hand bending apparatus for bar iron, particularly iron or concrete
IPC: B21D11/12
Filed: 1948-07-07
Abstract: 641,865. Angular bending. MORDECAI, T. J. July 7, 1948, No. 18255. [Class 83 (iv)] A hand operated bar-bending apparatus comprises a base-plate 4 secured to a bench &c. 3 and carrying an abutment roll 11, a former roll 14 and a bending lever 13 carrying a roll 16 and mounted on the former roll pin 12. In order to maintain equal height of the rolls the base-plate is joggled an amount equal to the thickness of the bending lever. The rolls may be adjusted in holes in the base-plate and bending lever and may be replaced by non- circular formers.
Patent GB-1022290-A (GB)
Title: Free-running multivibrator circuit
Inventor: HOEKS BAS
IPC: H03K7/06
Filed: 1963-05-08
Abstract: 1,022,290. Transistor oscillator circuit. HEWLETT-PACKARD CO. May 8, 1963 [June 1, 1962], No. 18260/63. Heading H3T. In a cross-coupled transistor free-running multivibrator the emitter electrodes of the transistors are connected by circuit means, including two semi-conductor devices connected in series in conduction opposition, the devices being such that they are capable of storing charge in the vicinity of their junctions during forward conduction and sustaining reverse conduction in the presence of the stored charge, which reverse conduction ceases when the stored carriers are suddenly depleted Two transistors 9, 11 are cross-coupled as shown in the Figure, and are alternately heavily conducting and non-conducting, the emitter current of each transistor flowing to earth from resistors 29 or 31 and to voltage source 39 through step-recovery diodes 35 or 41 (see Specification 961,857). If, during one half-cycle of operation transistor 9 is heavily conducting current flows through the diodes 35, 41, carriers being stored about the junction of diode 41 during the forward conduction while the stored carriers about the junction of diode 35 from the previous half-cycle are depleted. When the stored carriers are suddenly depleted a signal appears at the collector of transistor 9 as a result of the decrease in current in that transistor which signal is passed to the base of transistor 11 to render it heavily conductive and consequently transistor 9 further less conductive. Current now flows through diode 35 in the forward direction and in the reverse direction through diode 41. When the supply of stored carriers in diode 41 is suddenly depleted transistor 11 becomes less conductive and transistor 9 heavily conductive again and the cycle is repeated. The frequency at which the circuit operates is determined by the magnitude of IC which is controlled by resistor 37 and variable voltage source 39. Capacitors 25, 27 in the cross-couplings may be replaced by Zener diodes.
Patent GB-1469709-A (GB)
Title: Engine
IPC: F02C6/14
Filed: 1974-04-26
Abstract: 1469709 Gas turbine plant; turbines NRG Inc 26 April 1974 [30 April 1973] 18269/74 Headings FIG and FIT  A gas turbine engine, e.g. for a road vehicle, comprises a positive displacement compressor 11, the air output of which is heated in indirect heat exchanger 49 before expanding through an axial or radial flow turbine 55 driving the compressor. The expanded air then passes to a combustion chamber 67 where fuel is burnt, the combustion products passing through heat exchanger 49 to an exhaust outlet 81. Heat exchanger 49 may be assisted by a parallel connected heat accumulator 83 containing a matrix of alumina pellets 85. The latter are heated during steady running by combustion products tapped through line 91 and flowing via channel 87 to exhaust 97. A valve 89 cutsoff the tapped flow when sensor 93 detects a desired temperature of the matrix. During steady running or periods of gradual acceleration a valve 99 prevents flow of air from the compressor output line 41 to heat accumulator 83. However should the accelerator pedal (115), Fig. 2 (not shown), be rapidly depressed an hydraulic damper (129) in the linkage (127) between the pedal and valve 99 enables the latter to temporarily open and permit air-flow to pass through accumulator 83 to supplement the output of heated air from heat exchanger 49. Turbine 55 provides useful output to the road wheels and drives compressor 11 through a shaft 59, supported in air or other bearings, and gearing 61, 63. Compressor 11 has a reciprocating piston 23, a pressure responsive outlet valve 37 and an inlet valve 17 actuated by a crankshaft mounted cam 25 via push-rod 27 and rocker 29. The compressor cylinder 15 may be cooled by fins or a water jacket 43. Any other type of positive displacement compressor may be used. Speed and temperature sensors 117, 119 shut-off the fuel valve (103) if excessive values are detected. Turbine 55 may be provided with variable inlet nozzles (147), Fig. 3 (not shown), adjusted by an hydraulic actuator (135) in response to the speed related output pressure of an engine driven pump 131. A motor 121 is provided for starting, a pressure sensor 125 maintaining fuel valve (103) closed until the air-pressure is sufficiently high.
Patent GB-1009142-A (GB)
Title: New or improved joint for building sheets
Inventor: PAYNE HAROLD JAMES WILLIAM
IPC: E04D3/365
Filed: 1963-05-09
Abstract: 1,009,142. Sheet metal joints. H. H. ROBERTSON (HOLDING Ltd.) May 6, 1964 [May 9, 1963], No. 18308/63. Heading E1K. Two corrugated sheets are joined edge to edge by seating an inverted channel 12 on the edge of one sheet 10 in the bottom 16 of an edge corrugation of another sheet 11. Bolts 17 are passed through the overlap-pad parts. The channel 12 may contain a sealing compound.
Patent GB-901175-A (GB)
Title: Spray guns
Inventor: EDWARDS HARRY
IPC: B05B15/55
Filed: 1958-06-09
Abstract: <PICT:0901175/IV(a)/1> <PICT:0901175/IV(a)/2> Polyurethane foams are formed in a spray gun by feeding polyisocyanate to one inlet and the remaining ingredients as a pre-mix to another inlet.  Ingredients referred to are hydroxyl group-containing polyesters or polyethers, polyisocyanates, water, catalysts &c.  The spray gun comprises a mixing chamber A having a stirrer B, feed inlets E and F for the polyurethane forming ingredients, an air inlet G, and an exit jet I surrounded by an air jet J with an air inlet K.  The stirrer body consists of a shaft of polygonal or circular cross-section, shown in the Figure of the Complete Specification as square, the longitudinal surfaces or edges of which clear the internal surface of the mixing chamber by not more than 3 mms.  The stirrer shaft O has a baffle P mounted on it with the inlet E leading to the mixing chamber on one side of the baffle whereas the inlets F and G lead to a cavity Q on the other side of the baffle.  The stirrer may be driven by an electric or pneumatic motor mounted on the spray gun or by a flexible drive.  Further inlets may be provided to the gun, e.g. for chopped glass fibre.  Air from the inlet G may be blown through the mixing chamber to clean it and there may be air inlets in the feed lines for cleaning purposes.  The Figure of Provisional Specification shows a spray gun wherein the stirrer consists of a pegged shaft.
Patent GB-128831-A (GB)
Title: Electric Circuits Instantaneously Sensitive to Photo-electric Action.
Inventor: TAVANI FRANCIS
IPC: H04N5/30
Filed: 1918-11-11
Abstract: 128,831. Tavani, F. Nov. 11, 1918. Selenium and like cells. - In photophones and like apparatus in which selenium and like cells are employed the effects of lag are diminished by the following arrangement of the apparatus. The fluctuating beam of light L whose variations are to be made manifest in the telephone T falls on two selenium cells a<1>, b<1>. By periodic movements of the shaft P, which may take place every one or two minutes under clock work control, the cells a<2>, b<2> are substituted for the cells a<1>, b<1>. Another shaft P<1> operated in identical manner supports the cells c, d, of which one is subject to the influence of a steady beam of light L', and the other is recovering in darkness. In the winding R of a triple-wound transformer R, S, R', a current flows which is the resultant of the fluctuating current from the battery m and a current from a battery m<1> which is decreasing owing to the rising resistance of the cell C. In the winding R' there is a current which is a resultant of the fluctuating current from the battery n and a current from a batterv n' which is increasing owing to the falling resistance of the cell d. According to the Specification, the current in the secondary winding S and telephone T is as a result of this system of connexions less subject to the effect of lag in the response of the cells a<1>, b<1> to the fluctuations of the incident beam L than would normally be the case.
Patent GB-481186-A (GB)
Title: Improved building bricks
IPC: E04B2/42
Filed: 1936-07-03
Abstract: 481,186. Walls ; building blocks. UYTTENDAELE, J. F. July 3, 1936, No. 18474. [Classes 20 (iv) and 87 (i)] A wall is built up of blocks each having in its upper surface two longitudinal channels 2, leaving outer flat surfaces 1 to receive mortar 15. Between the channels 2 is a flat-topped projection 3 which serves as a handle and has its upper surface level with, or above or below, the surfaces 1. A recess 8 may be formed in the underside of the block, and grooves 4, 6 in the surfaces 1 and the side faces of the block. Cavities 9, 11 may be provided in the block. Blocks adjacent window &c. frames may have one corner cut away to receive them.
Patent GB-662112-A (GB)
Title: Improvements in or relating to vapour-electric discharge devices
IPC: H01J13/02
Filed: 1949-07-13
Abstract: 662,112. Discharge apparatus. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. July 13, 1949 [Aug. 19, 1948], No. 18495/49. Class 39 (i). A vapour-discharge device comprises a starting electrode for producing the cathode spot on the liquid cathode, a keep-alive electrode to which is connected a source of unidirectional current to maintain the cathode spot, and a conductor which extends through the cathode and is arranged to carry current in a direction opposite to that in the keep-alive and whereby the cathode spot is anchored near the conductor. A metal container 1 carries a mercury, gallium, caesium, potassium or sodium cathode 2, a starting electrode 10, and a keepalive electrode 12 mounted on a conductor 13 which passes through insulators 14. A fullwave rectifier 21, fed from the transformer 20 is connected to the conductor 13 and impedances 18 in the return leads 16, 17 of the keep-alive circuit and the circuit of the conductor 13 are adjusted whereby the keep-alive arc will maintain one cathode spot and the total current, e.g. 30 amperes, in the conductor 13 is sufficient to anchor the cathode spot. The keep-alive arc current operates relay 25 to disconnect the starting transformer 11. The current in conductor 13 for fixing the cathode spot may be independent of the keepalive current.
Patent GB-256769-A (GB)
Title: Improvements in writing pens, mapping pens and the like
IPC: B43K27/08
Filed: 1925-07-21
Abstract: 256,769. Cocking, H. July 21, 1925. Penholders.-A writing, mapping, or like pen is provided with two or more nibs for use with different inks, means being provided for covering the nib or nibs not in use. As shown, the nib 1 is held in a holder b mounted on a wood or other stem a, and the second nib 2 is held in a holder c slidable on the stem. A sheath d is secured to the stem a by a pin d<1> passing through slots in the holder c. In the position shown, the nib 2 is covered by the sheath d to prevent soiling of the fingers, and when in use, the nib 2 projects beyond the nib 1.
Patent GB-887134-A (GB)
Title: Improvements in broaching tools
IPC: B23D43/00
Filed: 1960-05-27
Abstract: 887,134. Broaching. LAPOINTE MACHINE TOOL CO. Ltd. May 27, 1960 [Jan. 6, 1960], No. 18812/60. Class 83 (3). A broach for gears and splines comprises a fixed set of cutters 12 on a draw-bar and an axially aligned pilot and cutter section 26, 32, rotatable on the bar. The draw-bar has a pulling-head, a plain pilot section 16, a set of roughing cutters 12 increasing to the final root diameter required on the work, a tongue 28 and an arbor 20. A sleeve 22 on the arbor has a slotted end, engaging the tongue 28 with a clearance, and carries the pilot-toothed member 26. Keyed and clamped by a nut 34 on the arbor is the set of finishing cutters 32 all of the same diameter but gradually increasing to the final cutting width. A spacer 40 on the end of the bar allows the sleeve 22 to float axially. As the finishing cutters wear, the front one is removed and a new cutter inserted at the rear.
Patent GB-143755-A (GB)
Title: Improvements in or relating to pipe-cleaners
IPC: A24F9/06
Filed: 1919-07-29
Abstract: 143,755. Harrison, W. J. July 29, 1919. Cleaners for tobacco pipes.-The leading end A<1> of a wire A is rounded to ride up inside the bowl, and the other end A<2> is formed with a hook or eye for the attachment of tape B or absorbent textile material.
Patent GB-574229-A (GB)
Title: A silent lever escapement
IPC: G04B15/08
Filed: 1943-11-13
Abstract: 574,229. Escapements. GUMMERSALL, T. A. Nov. 13, 1943, No. 18914. [Class 139] A balance lever 5 which is forked at one end to reeeive the impulse pin 7 of a balance wheel 8 and which has a counter-balance 9 at its other end, oscillates on an arbor 6. A pallet member 10 which oscillates in unison with the lever 5 on the arbor 6 has pallet arms 11 and 11a to which are secured thin pallet springs 12 and 12a carrying pallet pins 14 and 14a adapted to engage the teeth 2 of an escape wheel 1. The teeth 2 of the escape wheel 1 each have a locking face 3 and an impulse face 4. " A Y- shaped spring 15 which acts as a resilient buffer to the impulse pin 7 is secured to a, block 18 on the lever 5 so that the base of the spring fork 15 lies at the base of the forked recess 16 in the end of the balance lever 5.
Patent GB-1350926-A (GB)
Title: Electro-mechanical devices
IPC: H03H3/02
Filed: 1971-06-04
Abstract: 1350926 Piezo-electric elements MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 4 June 1971 [5 June 1970] 18945/71 Heading HlE A peizoelectric resonator suitable for thickness mode vibration at frequencies above 20 MHz comprises a plate of ceramic material having an electro-mechanical coupling factor for a thickness extensional mode at least four times that for the contour mode. The plate preferably has a ratio of length: thickness greater than 7 : 1 and consists of 97À7 mol. per cent PbTiO 3  1À3 mol. per cent La 2 O 3  and 1À0 mol. per cent MnO 2 . The ceramic material may be polycrystalline and the edges of the plate are preferably rough with dimension of unevenness 16 approximately equal to a quarter wavelength at the vibration frequency. The periphery of the plate is preferably irregular to reduce spurious responses particularly in the contour mode. The resonator may be made by scribing and breaking the ceramic plate and then electrodes are plated on the major surfaces and the material polarized perpendicular to the major plane. The peripheral unevenness dimensions may be about 20Á and the resonator is preferably operated in an overtone mode of the thickness extension vibration. The plate may alternatively be shaped by ultrasonic machining using abrasive powder.
Patent GB-313975-A (GB)
Title: Firing mechanism for automatic firearms
IPC: F41A19/46
Filed: 1929-06-20
Abstract: 313,975. Ceskoslovenska Zbrojovka Akciova Spolecnost v. Brne. June 20, 1928, [Convention date]. Breech actions, sliding breech-block.-Relates to automatic guns in which the breech-block 1 is retained in open position by a pivoted spring- controlled firing hammer 3 engaging a notch c in the underside, of the block, the hammer having two noses 3a, 3b engaged by hooks 5a, 6 on a trigger lever 5, thereby necessitating one pull of the trigger 4 to release the breech-block and a second pull to release the hammer. According to the invention, a deep projection 1<a> is provided in front of the notch 1<c> which, during rapid closing of the breech-block under normal firing conditions, causes the hammer to be strongly depressed so that it misses the notch 1<c>. Single shots can thus be fired by one pull only of the trigger, the hammer being, depressed by the surface r and projection 1<b> on the block and retained only by the hook 5a, assuming the trigger is let go. The hook 6 is in the form of a lever pivoted to the trigger-lever and is pressed by one arm of the hammer spring 8 to engage the nose 3<b> and retain the hammer if the trigger is held pulled, the removal of pressure from the trigger causing the control to pass to the hook 5<a>. The loading plate 2 of the magazine retains the breech-block in open position when the magazine is empty, and the hammer engages the notch I<c> to retain the breech-block prior to firing the first shot, a double pull of the trigger being then required to close and fire the gun.
Patent GB-121008-A (GB)
Title: Improvements relating to Sparking Plugs for Internal Combustion Engines and the like.
Inventor: GIMBERT JOSEPH EDWARD
IPC: H01T13/46
Filed: 1917-12-27
Abstract: 121,008. Gimbert, J. E. Dec. 27, 1917. Sparking-plugs.-One or more split metal rings C are mounted between the central electrode B and the casing A', to form additional spark-gaps, and a similar ring may be mounted on the end of the central electrode.
Patent GB-147127-A (GB)
Title: Improvements in and relating to apparatus for the electrical long distance control of the valve gear of a hydraulic gun pointing gear
IPC: E01H3/02
Filed: 1920-07-07
Abstract: 147,127. Krupp Akt.-Ges., F. Dec. 4. 1916, [Convention date]. Addition to 147,126. Mountings.-Relates to electric long-distance control of the valve-gear of the hydraulic gunlaying apparatus described in the parent Specification, in which an electric receiving-motor G operated from a. distant transmitter H acts through a hunting-apparatus F to open the hydraulic control valve E, which valve is closed when the gun has moved through the prescribed angle by gearing connecting it with the gun barrel A. According to the invention, the motor G instead of acting directly on the apparatus F to move the valve E, acts on a circuit-closing device M, N, P, Q, which, through an automatic switch device R, puts into and out of action (1) a special motnr S for moving the valve E, and (2) the magnetic coils c<4>, c<4> of the cut-out valves B, C in the hydraulic pressure pipes. The receiving- motor G drives a shaft g<1> geared to switch arms p<1>, q<1> moving over contacts m<2>, m<3> and n<2>, n<3> on disks M, N which control respectively fine and coarse adjustments of the gun. These disks are rotated through a shaft a<8> by the arc a<6> on the gun to follow the switch arms and bring the gaps between the contacts again into register with the arms when the desired movement of the gun has been effected. Conductors r<1>, r<2>, r<3> and r<4>, r<5>, r<6> lead from the devices p', M and q<1>, N to a casing R which contains magnetic coils for operating cores Z, Y, W, U, T, Fig. 3, to switch in and out the current from a circuit k<11>, k<12> leading from a main K to the field of the motor S, which current is led to the armature of the motor S by conductors r<9>, r<10>, and to the magnets c', c<4> by conductors r<11>, r<12>. The device p', M is geared to rotate at a much faster rate than the device q', N and the gaps between the contacts are so proportioned that before the arm q' makes contact the arm p' acts to switch in the motor S. To ettect this the arm p<1> on touching the contact m<3> makes a circuit through the coil y' to raise the core Y, the top bridge y<2> of which establishes a circuit through the motor S and the bottom bridge y<3> one through the cut-out magnets. When the contacts q', n<3> touch, the cores T, U are raised and the circuit through coil y<1> is broken, thereby lowering the core Y. A new working circuit through the motor S is then established by the upper bridges of the cores U, T, and a new circuit through the cut-out coils by way of the lower bridge of the core U. The device q<1>, N then controls the motor S and the device p', M may continue to rotate without affecting the switch device. When nearing the position in which the gaps again register with the switch arms, the device q<1>, N ceases to be effective and the control then passes to the device p', M.
Patent GB-842566-A (GB)
Title: Improvements in and relating to fastener devices for mounting in an aperture or recess of a support
Inventor: PARKIN LESLIE
IPC: F16B12/24
Filed: 1957-06-19
Abstract: 842,566. Locking bolt-like pins; dowelling; spring clip-fastenings. CARR FASTENER CO. Ltd. June 16, 1958 [June 19, 1957], No. 19369/57. Classes 44, 89(1) and 89(2) A fastener-member comprises a body 1, Fig. 2, of sheet-metal with a hole 3, the inner-perpiphery having tongue-means 2 to engage a plain-stud or screwed-stud 4, Fig. 4, and fingers 4 pressed outwardly to engage the wall of a hole a<1>, housing the body, by a member 8. The screwed stud 14 has a head 13 with a cover 15 snapped thereover. The fasteners may be used in pairs, Fig. 3, with a dowel 12 therebetween, to interconnect parts a", b<1>.